PNI TCM 5 - Manual (Page 26)

PNI Sensor Corporation Doc #1007537 r12
TCM3 & TCM5 User Manual- Sept 2011 Page 26
Module with large negative pitch (<-45°)

60° with 10°-20° positive roll

150° with 10°-20° negative roll

240° with 10°-20° positive roll

330° with 10°-20° negative roll.
5) Hold the module level and stable.
6) Press the Start button and wait for a sample to be taken.
7) Rotate the module to the next heading, approximately 90 degrees, and hold the module stable
until the next sample is taken.
8) Repeat this until all 12 samples are taken.
9) Press the Save button.
10) Calibration results will be displayed in the Results window with Coverage X, Y and Z in % and
Std Deviation of Magnetic Field Magnitude in uT. The Coverage score is how much of the sphere
was each sensor exposed to in percent to describe the shape of the distortion to be corrected for.
You want a score of 85% or better for X and Y, with the above method Z will be below 50%. The
Std Deviation score should have a result of 0.1uT or better. The Std. Deviation score represents
how well the distortion was able to be described and compensated for. A poor score will result if
sources of distortion to be calibrated out moved during the user calibration relative to the module.
A magnetically noisy environment will also result in a poor calibration.